Hair dryer



FIG. 1 is a side perspective view of a hair dryer embodying my new design;

FIG. 2 is an enlarged scale side elevational view showing the side opposite that shown in FIG. 1;

FIG. 3 is a top plan view thereof;

FIG. 4 is a front end elevational view thereof; and

FIG. 5 is a rear end elevational view thereof. 

The ornamental design for a hair dryer, as shown and described. 